Music-leaf turner



Aug. 20, 1929. a. L.. NoRTwED MUSIC LEAF TURNER Filed Oct. 30, 1928 2 Sheets-Sheet est,

Aug. 20, 1929. B. L. NoRTwl-:D

MUSIC LEAF TURNER Filedv Oct. 30, 1928 2 Sheets-Sheet HEERE!!! Patented Aug. 20, 1929.

UNITED STATES BENJAMIN L. NORTWED, OF MITCHELL, SOUTH DAKOTA.

MUSIC-LEAF TURNER.

Application led October 30, 1928.

This invention relates to music leaf turners and more particularly to a device of this character adapted for attachment to a music stand of the usual type.

An important object of the invention is the provision in a device of this character of a construction such that the complete turning apparatus may be disposed in a very small radius and slipped in the carrying case with the music stand to enable its ready transportation from place to place.

A further object of the invention is to provide a novel and improved construction controlling the successive movement of a plurality of turning arms associated with the apparatus.

A still further object of the invention is to produce a device of this character which may be readily and cheaply manufactured, which will be durable and efficient in service, and a general improvement in the art.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a front elevation showing a music stand having a leaf turner constructed in accordance with my invention;

Figure 2 is an enlarged front elevation of the leaf turner in applied position;

Figure 3 is a side elevation thereof, the

terminals of the arms being broken away;

Figure 4 is a plan view of the arm;

Figure 5 is a section on the line 5-5 of Figure 2;

Figure 6 is a perspective of the plate forming the base for the turner mechanism.

Figure 7 is a fragmentary detailed view showing the mounting of the operating pedal on the stand.

Referring now more particularly to the drawings,` the numeral 10 indicates a plate adapted to flatly abut the front face of the center rib 11 of a music stand, said plate having at one side adjacent its bottom an angular ange 12 acutely related to the rear face of the plate and having an aperture 13 formed therein. In the face of the plate, a slot 14 is formed, which opens through the opposite edge thereof. In the aperture of the flange 12 is mounted a threaded rod 15 having an angular end portion 16 extending through the slot 14 and provided with a head 17. A knurled thumb-screw 18 is placed upon the Serial No. 318,065.

rod 15 and serves to adjust the angular'portion longitudinally in the slot. The body of the rod is spaced from the rear face of the plate to limit the passage of the rib 11, so that when the nut 18 is tightened, the angular portion 16 will abut one edge thereof and the flange 12 the opposite edge thereof. Due to the angular arrangement of these elements, the rib is forced into engagement with lthe rear face ofthe plate 10 and held firmly thereagainst in a suitable adjusted position therealong.

Outstanding from the front face of the plate are a pair of vertically spaced superimposed ears 19 apertured for the passage of a vertical pivot 20 upon which are mounted the hubs 21 of a pair of arms 22 and 23 which are offset, as indicated at 24, so that their outer ends lie in approximately the saine plane. The arm whose extremity lies outermost in the set position of the device, hereinafter more fully explained, is provided upon its rear face with a projecting tit 25 which maintains the arms in spaced relation, for a purpose presently to appear.

Springs 26 constantly urge rotation of the arms 22 and 23 from right to left and consequently keep the arm 22 pressed against the tit 25 of the arm 23 when these arms are extended in t-he same general direction. The springs 26 may be conveniently secured to the ears 19 at one end and engage against the arm at the other end, being coiled about the pivot intermediate their ends. Each arm and 23 is provided with a spring steel wire extension 27 along which sheet clips 28 may be longitudinally adjusted.

In combination with this structure, I provide an escapement element comprising a lever 29 pivoted at the rear end of a rearwardly extending arm 30 projecting from the left hand edge of the plate 10. The forward end of this lever projects between vertically spaced tits 31 formed upon the edge of the plate and is normally held against the uppermost of these tits by a spring The forward end of the lever is slotted and has proj ecting into the slot from the arms 36 and 37 produced thereby latch shoulders 38. These shoulders are of substantially the same depth as the thickness of the outer ends of the arms 22 and 23 and in the set position of the apparatus, the arm 23 is -engaged with the latch shoulder 38 of the lower and longer arm 37.

The latch shoulder 38 of the shorter upper arm 36 is aligned with the outer edge of the arm 22 and with the space between this arm and the arm 24 provided by the spacing element or tit 25. The tips of these latch shoulders are in the same plane and it will be obvious that in the set position, if the lever 29 is depressed, the latch shoulder 38 of the arm 37 will be withdrawn from the arm 23 and at the same time, the latch shoulder 38 of the arm 36 will pass in front of the arm 22 to prevent movement thereof. The arm 23 if released will be swung byits spring 26 from the right hand to the left hand position, thus turning a sheet attached thereto by the extension arm and its clips. TWhen the lever 29 is released and permitted toV elevate through its spring 32, the arm 22 will be releasedand permitted to come against the stop shoulder ofthe arm 38, where its motion will be checked until its lever is again depressed.

As a convenient means for operating the lever 29, I provide a foot pedal 39, which may be conveniently pivoted to the connection of the folding` legs 40 to the stand. Such connections are usually in the form of an eared band t8 to the ears 44 of which the legs t0 are pivoted. This band may be conveniently provided with an extra ear 4:5 upon which the pedal 39 may be pivoted, as more clearly shown in Figure 7 Attached to the free end of this pedal isa flexible element 4l which is connected to the lever 29 through a spring 42. Upon depression of the pedal, the lever 29 will be depressed by reason of the fact that the spring 42 is of greater strength than the spring 32 controlling this lever.` If, however, the movement of t-hepedal is excessive,

the lever 29 engages the .lowermost stop or tit 3l, so that its motion is limited and the excess movement of the pedal is compensat-ed for by the spring.

It will be obvious that while only two arms are herein illustrated and these arms will accommodate turning mechanism for a six page composition, additional arms might be provided, if desired, by a simple extension of the slot and an increase in the number of escapement teeth upon the lever 29. Other modifications being possible in the .construction hereinbefore set forth, I do not limit myself thereto except as hereinafter claimed.

I claim zl. In a music leaf turner, a plate having means whereby it may be attached to a central element of a music rack, a pair of arms carried thereby and swingable in a horizontal plane, spring means constantly urging rotation of the arms in one direction, an oscillatory escapement lever pivoted upon the plate and having engagement with the arms holding them to one side of the plate against the action of said springsy and singly and successively releasing the arms by successive oscillations thereof, and means for causing successive oscillations of the escapement lever.

maite-e9 2. In a music leaf turner, a plate having means whereby it may be attached to a central element of a-music rack, a pair of arms carried thereby and swingable in a horizontal plane, spring means constantly urging rotation of the arms in one direction, an escapement lever pivoted upon the plate and having engafrement With the arms holding them lto one side of the plate against the action of said springs, and singly and successively releasing the arms by successive operations thereof, means for causing successive operations of the escapement lever, and coacting means upon said arms maintaining theI arms in 'spa-ced relation when disposed at the lfirst named side of the plate to permit proper engagement of the escapement lever therewith,

3. In a music leaf turner, a plate having means whereby it may be attached to a central clement of a music rack, a pair of arms carried thereby and swingable in a horizontal plane, spring means constantly 'urging rotation of the arms in one direction, an escapement lever pivoted upon the plate and having a slot for the reception of the arms, opposite walls of said slot having teeth for alternate coaction with said arms, means normally maintaining the lever in a position engaging a tooth thereof with the outermost arm, and means for shifting the lever against the action of the first named means.

4i. In a music leaf turner, a plate having means whereby it may be attached to a central element of a music rack, a pair of arms carried thereby and swingable in a horizontal plane, spring means constantly urging rotation of the arms in one direction, an escapement lever pivoted upon the plate and having engagement with the arms holding them to one side of the plate against the action of said springs and singly and successively releasing the arms by successive operations thereof, and means for causing successive operations of the escapement lever, the outer ends of said arms being offset to lie in the same plane, the arm whose outer end is in advance as regards the direction of rotation having a tit for engagement with the confronting face of the other of the arms to thereby maintain aspace between said arms for the recept-ion of a latch shoulder of the escapement lever.

5. In a musi-c leaf turner, a plate having means whereby it may be attached to a central element of a music rack, a pair of arms carried thereby and swingable in a horizontal plane, spring means constantly urging rotat-ion of the arms in one direction, an escapement lever pivoted upon the plate and having engagement withthe arms holding them to one side of the plate against the action of said springs and singly and successively releasing the arms by successive operations thereof, means for causing successive operations of the escapementleven including means nor- Cil mally maintaining said lever in one position, means limiting movement of the lever to the opposite position, a treadle connected with the lever to operate the same, and a spring in the connection between said treadle and lever.

6. In a music leaf turner and in combination, a plate having a vertically extending pivot, a pair of arms mounted on said pivot having their outer ends offset to lie in the same plane, a lever pivoted to said plate to swing in a plane perpendicular to the plane of swing ofthe arms, said lever having a slot in its end for the reception of the arms, opposite walls of the slot having teeth longitudinally spaced apart a distance equal to the thickness of the outermost arm, springs constantly urging rotation of the arms in a direction tending to disengage them from the slot of the lever, means normally maintaining the lever in a position preventing escape of the outermost arm engaged therewith, and

means for shifting said lever to disengage the outermost tooth of the lever from said outermost arm.

7 In a music leaf turner, a plate, music leaf turning apparatus carried thereby, said plate having at one edge thereof a iange disposed at an acute angle to the body of the plate and having formed in its face a slot, an arm directed through an opening formed in said flange and having an angularly disposed portion provided with a head for extension through said slot, and means for drawing the arm through the opening of the flange and for maintaining it in adj usted positions, said arm being spaced from the face of the plate a distance to admit therebetween the central rib of a music stand.

In testimony whereof I hereunto aiX my signature.

BENJAMIN L. NORTWED. 

